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Leases - Balance Sheet and Expense (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Leases  
Assets Operating $ 15,704
Assets Finance 54,048
Total lease assets 69,752
Liabilities Current Operating $ 2,401
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued Liabilities, Current
Liabilities Noncurrent Operating $ 14,195
Liabilities Noncurrent Finance 58,435
Total lease liabilities 75,031
Fixed operating lease cost 2,473
Finance lease cost - amortization of right-of-use asset 1,822
Finance lease cost - interest on lease liability $ 2,565